66029191 has 2 divisors, whose sum is σ = 66029192. Its totient is φ = 66029190.

The previous prime is 66029179. The next prime is 66029261. The reversal of 66029191 is 19192066.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 66029191 - 2⁷ = 66029063 is a prime.

It is a super-2 number, since 2×66029191² = 8719708128228962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66029291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33014595 + 33014596.

It is an arithmetic number, because the mean of its divisors is an integer number (33014596).

Almost surely, 2^66029191 is an apocalyptic number.

66029191 is a deficient number, since it is larger than the sum of its proper divisors (1).

66029191 is an equidigital number, since it uses as much as digits as its factorization.

66029191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 66029191 is about 8125.8347878849. The cubic root of 66029191 is about 404.1835729965.

The spelling of 66029191 in words is "sixty-six million, twenty-nine thousand, one hundred ninety-one".